(a)[2]
The plane arrives in Dubai at local time $17\,20$. The flight lasts $6$ hours $50$ minutes. Dubai local time is $3$ hours ahead of London local time. Calculate the London local time when the plane departed.
(b)[1]
At some stage of the flight, the temperature inside the plane is $17^{\circ}\text{C}$. The temperature outside the plane is $-43^{\circ}\text{C}$. Calculate the difference between the inside and outside temperatures.
(c)[1]
The plane leaves London where the outside temperature is $17^{\circ}\text{C}$. It climbs to a height at which the outside temperature is $-43^{\circ}\text{C}$. The temperature falls by $2^{\circ}\text{C}$ for each increase of $300\text{ m}$ in height. Calculate how much the plane rises in height.